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https://issues.apache.org/jira/browse/HADOOP-12957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15261065#comment-15261065
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Hadoop QA commented on HADOOP-12957:
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| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12801126/HADOOP-12957.003.patch
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| JIRA Issue | HADOOP-12957 |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/9195/console |
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> Limit the number of outstanding async calls
> -------------------------------------------
>
>                 Key: HADOOP-12957
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12957
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HADOOP-12957-HADOOP-12909.000.patch, 
> HADOOP-12957-combo.000.patch, HADOOP-12957.001.patch, HADOOP-12957.002.patch, 
> HADOOP-12957.003.patch
>
>
> In async RPC, if the callers don't read replies fast enough, the buffer 
> storing replies could be used up. This is to propose limiting the number of 
> outstanding async calls to eliminate the issue.



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